IDK....What are the settings (if any) you're punching into the sequence layers dialogue box? I could be relevant.
You have shifted your layers to the left. What you should have done is set an in and an out point for each layer. You can select all layers (Ctrl/Cmnd + A) move the CTi to the first frame of the comp and then press Alt/Option + [ to set the in point. Then press Alt/Option + ] to set the out point.
If you duration is only one frame and you want to end up with a movie you should be importing your images as a sequence. All you wold have to do is go to File>Import, pick one of the images and then make sure that the image sequence option is selected. This is a much more efficient way to handle the animation unless you need to make different adjustments or effects on each frame. You just need to make sure that your comp frame rate matches the frame rate of the image sequence. Check that by going to File>Interpret Footage>Main. Set the default frame rate for image sequences in Preferences>Import.
Setting in and out point did the thing.
Also I'll try importing my images as a sequence next time.